(Corrects first paragraph to make it clear that proposal rivals plan put forward by management, was not passed by management)

SAO PAULO, Oct 2 (Reuters) - Oi SA’s two biggest creditor groups on Monday announced an alternative plan to restructure the wireless carrier’s debt, about a month after their first attempt to rival a revamped proposal from the company’s management.

In a statement, the International Bondholder Committee and the Ad-Hoc Group of Oi bondholders said they would agree to swap 26.1 billion reais ($8.3 billion) worth of their Oi bond holdings into the equivalent of 88 percent of the company’s equity. They would also endorse injecting 3 billion reais of capital into Oi.